Number Twenty
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YouTubeKandi Brian
Number Twenty
Number Twenty in Decimal, Hex, and Binary Twenty is the smallest number whose name in English contains none of the letters that appear in the word "one". Mathematically, 20 is the third "tetrahedral number," meaning twenty spheres stack perfectly into a triangular pyramid: layers of 1, 3, 6, and 10 (each a triangular number) sum to 20. It's ...
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